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Resonating radio frequency ablation device

a radio frequency ablation and resonating technology, applied in the field of resonating radio frequency ablation devices, can solve the problems of mr unsafe objects in the room and pose safety risks

Active Publication Date: 2016-09-13
COOK MEDICAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention describes a method, system, and device for tumor ablation using a resonating radio frequency ablation device. The device includes a non-ferrous metallic rod that is wirelessly heated by RF energy from a connected RF generator. The device is designed to be used in a magnetic resonance imager and can be oriented to interact with the RF waves from the imager. The invention allows for efficient and safe ablation of tumors using a minimally invasive technique.

Problems solved by technology

While MRI does not emit ionizing radiation, it does pose safety risks concerning magnetically induced displacement force.
This concern increases when the MR system is used intraoperatively causing MR unsafe objects to be in the room close to the MR system, such as an RF generator.

Method used

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  • Resonating radio frequency ablation device
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  • Resonating radio frequency ablation device

Examples

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example 1

[0052]The proximal end of a titanium rod measuring 10 cm long and ⅛″ in diameter was inserted into the end of an 8 Fr inner diameter catheter. The titanium rod included two 1 mm diameter holes drilled through the rod transverse to the longitudinal axis of the rod. Fluoroptic® temperature probes were inserted into the holes at each end of the titanium rod. The rod, catheter and temperature probes were submersed into a gel within a clear plastic phantom. The titanium rod was positioned 1.5 cm from the wall and bottom of the phantom and centered along the length of the phantom. The gel was made from approximately 50 g of polyacrylic acid, 33 g of NaCl and 25 L of distilled H2O. The purpose of this gel was to approximate the conductivity of human tissue (about 0.47 S / m according to ASTM F2182-11a). The phantom was then placed at isocenter within the bore of the MR system (3.0 T). A scan was performed and the temperature of the electrically passive titanium rod was monitored. The results...

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Abstract

The invention relates to methods, systems, and devices for ablating a tumor with heat delivered from a non-ferrous metallic rod having a length adapted to support resonating radio frequency waves along the longitudinal axis of the rod. The tumor ablation may be carried out in an MRI where the radio frequency transmitter of the MRI wirelessly delivers the energy to heat the metallic rod.

Description

RELATED APPLICATIONS[0001]The present patent document claims the benefit of the filing date under 35 U.S.C. §119(e) of Provisional U.S. Patent Application Ser. No. 61 / 736,873, filed Dec. 13, 2012, which is hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to devices, systems, and methods which use radio frequency waves to resonate electrically conductive materials in dielectric mediums in order to generate heat sufficient to ablate tumor tissue. The invention can be used inside a magnetic resonance imager (MRI) where energy received from the radio frequency (RF) coil supplies the heat to ablate the tumor tissue.BACKGROUND OF THE INVENTION[0003]RF ablation is used in multiple applications to treat numerous diseases. Traditionally, RF ablation has been applied to heart tissue to treat cardiac arrhythmia (e.g., atrial fibrillation) by destroying abnormal heart tissue. This procedure is performed on thousands of patients annually around the world and is...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61B18/14A61B18/08A61B18/00
CPCA61B18/1492A61B18/082A61B2018/00011A61B2018/00023A61B2018/00791A61B2018/1475
Inventor GROSS, DAVID C.
Owner COOK MEDICAL TECH LLC